exam Maths Puzzle Numerical Ability

Can you help??? Simply the following:
(3a^2)^-2

and
6x^-2 divided by x^-3

Thanks for helping!!

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exam Other Question

Okay!! Well I kind of get what is going on but I can't get passed a certain poit here is the question and what I have so far. Pleasle tell me what I am doing wrong and i need help Use the quadratic formula to solve the following equations. Show all major steps involved and leave solutions in radical form (when applicable).

b: 2x^2 - 5x = 3
c: 5x^2 - 2